--- a/QtSingleApplicationQt5/qtlocalpeer.h	2015-07-15 00:37:52.607697860 -0500
+++ b/QtSingleApplicationQt5/qtlocalpeer.h	2015-07-15 00:38:05.327732874 -0500
@@ -43,6 +43,7 @@
 #include <QLocalServer>
 #include <QLocalSocket>
 #include <QDir>
+#include <QDataStream>
 
 #include "qtlockedfile.h" 
